Dissecting-microscope



(No Model.)

L E SAYRE DISSEGTING MICROSCOPE.

Patented Nov. 17,1891.

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To all whom it may concern.-

UNITED STATES PATENT OFFICE.

LUOIUS ELMER SAYRE, OF LAIVRENOE, KANSAS.

DlSSECTING-MICROSCOPE.

SPECIFICATION forming part of Letters Patent No. 463,168, dated November17, 1891. Application filed July 3, 1890. erlal No. 357,704. (No model.)

In the use of the ordinary simple dissectingmicroscope difficulties aremet with in the analysis of flowers and inspection of objects from thefact that both hands are necessarily employed in holding the instrumentand object under examination. To overcome this difficulty and to givefreedom in manipula tion of objects and in the handling of lenses at thesame time, I have invented a new and a useful improvement in thecombination, ar-

rangement, and mode of operation of the parts of the microscope, so asto allow it and the object under examination both to be held in the samehand at one and the same time, while the other hand is free to dissectand turn in different positions the object under examination. Thisdevice, combination, and improvement consist of a suit-able palm-pieceor handle to be held in the hand and to extend down toward the wrist. Atthe wrist end of this hand-piece is attached and connected by ahinge-joint an arm, which is allowed to move freely in a vertical planewhen the instrument is held in a position for use. The summit of thisarm, or the end farthest from the handpiece, is a socket which isthreaded on the on 1:- side. Into this socket is inserted and fitted aball, forming the ordinary ball-and-socket joint, and into a threadedhole properly made in this ball is screwed a small post, whichterminates at its other end in a needle-point. A screw-cap is screwed onthis socket, which forms the summit of the arm after the inserject underexamination as it is held between the thumb and forefinger of the handwhich holds the microscope. In the hand-piece is a groove of sufficientbreadth and depth to receive and protect the arm-post and lens whenclosed.

The annexed drawings give an illustration of the instrument and theletters indicate its several parts.

Figure 1 is a representation of the instrument partly in section, andFig. 2 showing it as held in the hand in use.

a is the hand-piece; b, the hinge-joint; c, the arm, which is connectedby the hingejoint to the hand-piece; d, the socket at the summit of arma; e, the ball at the base of post f, which fits into socket cl; f, thepost, which is screwed into ball 6 and supports the lens; g, thescrew-cap which covers socket d; h, a thread on outside of socket; I, ascrew at base of post f; J, a needle-point at extremity of The objectand purpose of my improvement are to afford such movement of theinstrument as will enable the lens to be brought over the object underexamination when the instrument and the object are both held in the samehand.

I do not claim, broadly, the invention of a handle of a simpledissecting-n1icroscope, nor any novelty in the hinges or joints used.

\Vhat I do claim as my invention, and desire to secure by LettersPatent, is-

1. The combination, in a simple dissectingmicroscope, of a groovedhand-piece a, with an arm 0, connected with said hand-piece by ahinge-joint b and having at its other extremity a socket d and capableof movement in the same plane with said hand-piece, and the furthercombination of both said handpiece a and arm 0 with a post f by means ofa balland-socket joint formed by inserting the ball 6, into which post fis screwed into post f, terminating in a needle-point J, upon 10 thesocket cl and adjustable by screw-cap g, which the lens is placed, saidparts being comand the further combination of all these said bined andunited substantially as set forth. three parts of the handle with thelens placed In testimony whereof I affix my signature in upon aneedle-point J, the termination of a presence of two Witnesses. 7

post f, all substantially as set forth. LUOIUS ELMER SAYRE.

2. An improved handle of a simple dissect- W'itnesses: ing-microscope,consisting of three parts, to FRED. E. STIMPSON, Wit: a groovedhand-piece a, an arm 0, and a E. MABEL SAYRE.

